<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
            @import url(./index.css);
            strong{
                width:100px;
                height: 100px;
            }
    </style>
</head>
<body>
    <div>我看看我能显示在哪里</div>写点文字来测试一下子
    <p>噼里啪啦嘟嘟快乐番薯考虑过就咖啡机大了愧疚感啊库连接关卡就干李开复加咖啡金坷垃嘟嘟你好啊</p>
    <strong>你好啊</strong>
    <script>
        let oDiv = document.getElementsByTagName('div')[0];
        oDiv.onclick = function(e){
            e.target.style.opacity = 1;
        }
    </script>
</body>
</html>